Samuel Park said this quote

Regret and pangs of conscience are feelings we assign to others to make the world seem a little more fair, to even things out a little and provide consolation. In reality, those who do wrong to us never think about us as much as we think about them, and that is the ultimate irony: their deeds live inside us, festering, while they live out in the world, plucking peaches off trees, biting juicily into them, their minds on things lovely and sweet.